. >> reporter: the last line of defense in an epic flu season that's still going strong. brian mooar, nbc news. >>> here in the bay area, people are also having a hard time finding flu shots. there are shortages at some locations. cvs pharmacy says, quote, due to high demand caused by the early outbreak of influenza, some of our locations may experience intermittent temporary shortages of flu vaccine, but we still have vaccine in stock. and a local pharmacist said he ran out on wednesday, has 24 people on the wait list and won't know until monday whether he will be able to get new vaccines. >>> organizers of a gun show this weekend at the cow palace claim it's their biggest turnout ever in the bay area. thousands of people lined up outside the event looking to buy guns and take home ammunition. our monty francis joins us from daly city with more. monty? >> reporter: good evening. you cannot just walk into the cow palace and walk out with a gun. that's because here in califoia there's a ten-day waiting period. there are, however, no such restrictions on ammunition. i've se